Bed for turret-lathes.



No. 800,440. PATENTBD SEPT. 26, 1905.

I J. HARTNESS.

BED FOR TURRET LATHES.

APPLICATION FILED JAN.29, 1904.

3 SHEETS-SHEET 1.

PATENTED SEPT. 26, 1905.

J. HARTNESS.

BED FOR TUREET LATHES.

APPLICATION FILED JAN. 29, 1904.

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No. 800,440. PATENTED SEPT. 26, 1905. J. HARTNESS.

BED FOR TURRBT LATHES.

APPLICATION FILED JAN. 29, 1904.

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UNITED STATES Parana FFIOE.

BED FOR TURRET-LATHES.

Specification of Letters Patent.

Patented Sept. 26, 1905.

Application filed January 29, 1904. Serial No. 191,086.

To (LZZ whom, it may concern.-

Be it known that I, JA ES HARTNESS, of Springfield, in the county of WVindsor and State of Vermont, have invented certain new and useful Improvements in Beds for Turret- Lathes, of which the following is a specification.

This invention has relation to turret-lathes or bar-working machines, and more particularly to that portion of such machines which is usually designated as the bed.

The object of the invention is to provide certain improvements in the bed by which its construction is lightened, cheapened, and simplified and its strength is increased and by which its setting up is easily and expeditiously accomplished.

A further object is to provide a bed which is best adapted for the reception of the turret-carriage and the automatic stops which govern the operation thereof and also for the reception of a transverselymovable head which carries the spindle-driving mechanism.

On the accompanying drawings, Figure 1 represents in perspective view a lathebed embodying the invention. Fig. 2 represents a front elevation of the same. Fig. 3 represents a vertical longitudinal section through the bed on about the median line. Fig. 4 represents the head end of the lathe in elevation. Fig. 5 represents the opposite end in elevation.

In a general way the bed illustrated upon the drawings may be stated to be adapted for the reception of automatic mechanism such as shown in my copending application for Letters Patent, Serial No. 167,068, filed July 27, 1903, and that shown in Letters Patent No. 635,888, dated October 31, 1899.

The bed itself is formed, preferably, of a single casting supported at its ends upon two legs or standards, which are likewise of cast metal. Generally speaking, the bed consists in part of a pan substantially oblong in plan, with rounded corners. The bottom of the pan is indicated at a, and it is inclined from its tail end toward its head end, so that the lubricant or the cooling medium supplied to the operative parts or to the tools and the work will collect at the head end, from which it may be discharged as convenience or requirements dictate. The tail-end wall a of the pan curves outwardly and upwardly, as does the head-end wall a but it will be observed that the latter projects vertically upward considerably above the wall a. The

front wall a and the rear wall a curve outwardly and upwardly, and their upper edges curve from a horizontal plane below the top of the end wall a to the plane of the top of the end wall a to expose the guides or shears, as will be explained. The bottom a is formed on its under face with thickened portions (0 a, which may be planed off, so as to rest upon the horizontal tops of the legs or standards b 0. Each of said standards, formed with a top plate and with end and side walls strengthened with ribs, is preferably arched, so that it forms a firm support for the pan and the parts thereon. Screws d are passed upward through the top plate I) 0 of the standards into bosses formed in the pan and projecting upwardly from the top face of the bottom thereof, and they serve to attach the pan and standards rigidly together.

Extending from the front wall a to the rear wall (0* is a vertical wall or plate 6, arranged near to and in parallelism with the end wall a and having its top edge in the horizontal plane in the top edge of the said wall a These two walls (which are connected by the front and rear walls of the pan to form a frame) are provided with guides or shears e 0, upon which a movable head (not shown) may be arranged to slide, and they are connected and braced by flat horizontal arched webs or plates 6 e projecting inwardly from the walls a (E, as illustrated in Fig. 1. The parts of thehead end of the bed, which supports the head-stock and its rapidly-moving elements, are formed integrally and are thus firmly braced and connected together.

Near the end wall a is an upright wall or plate firising from the pan and arranged par allel to the wall 0. The ends of said wall f are connected with the wall 6 by arched front and rear walls ff upon the upper edges of which are formed ways or shears f f*, respectively arranged in the same horizontal plane. These ways or shears are at equal distances on either side of the median line of the bed, and they are separated by a space equal to about one-third (more or less) of the width of the bed, so that the bed projects for some distance in front of and behind the said shears and the carriage (not shown) which may be supported thereby. The walls 0, f, f, and

f form, as it were, a shear-supporting frame which is oblong in plan view, said frame being braced by transverse ribs or braces ff (which rise from the bed-bottom) and f f, extending between the walls f f The front and rear walls f f are further connected by l f serving for the reception of the stop-bars which control the travel of the tool-carriage.

It will be observed from Figs. 1 and 2 that the front, rear, and tail-end wall of the panshaped bed are all lower than the longitudinal shears, so that there will be no interference with the tools on the turret or the free rotation thereof.

The important feature of the invention is the formation of the bed with the longitudinal shear-sum'iorting frame and the pan in which it is placed and, further, the addition of the transverse shear-supporting frame at a right angle to and at the head end of the first-mentioned frame. The two frames form a T in plan view, and by reason of their being formed integrally they are firmly connected and braced. The pan serves to receive not only the cooling medium supplied to the tools and the work, but also the chips or cuttings, and the slant given to the bottom of the pan causes the cooling medium to flow into the compartment in the head through the openings 9 g, formed in the wall 0.

Having thus explained the nature of the invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made or all of the modes of its use, I declare that what I claim is 1. A lathe-bed comprising a frame having longitudinal guides or shears, a transverse frame having transverse ways or shears arranged in substantially the same horizontal plane, said frames being rigidly connected and forming a 'l' in plan view, and a pan projecting forwardly and rearwardly from said firstmentioned frame and rigidly connected thereto and extending from said transverse frame to which it is rigidly connected end wise to the tail end of the longitudinal frame.

2. A lathe-bed comprising a longitudinal frame having longitudinal guides or shears, a transverse frame having transverse ways or shears at the head end of the longitudinal frame, said frame being rigidly connected, and a pan projecting forwardly and rearwardly from the base of the longitudinal frame and rigidly connected thereto, said pan having upturned front and rear walls which are coincident with and rigidly connected with the front and rear walls of the said transverse frames.

3. Alathe-bed comprising end standards, a pan supported thereby and having a bottom and side and end walls, a web or plate extending from the front wall to the back wall of the pan at the head end thereof, guides or shears on the head end wall and on said web or plate for the reception of a sliding headstock, and longitudinal shears extending from said web or plate toward the tail end of the pan and arranged between the front and rear walls of said pan, for the reception of atoolcarriage.

4:. A lathe-bed comprising a substantially oblong pan, a transverse vertical partition near its head end, transverse ways or shears on the head-end wall of said pan and on said partition, longitudinal vertical walls arranged between the side walls of said pan and projecting from said partition toward the tail end of said pan, and longitudinal ways or shears on said longitudinal walls.

5. A lathe-bed comprising a substantially quadrilateral pan having upturned front and rear walls, transverse ways or shears extending from the front Wall to the rear wall of the pan at the head end thereof and rigidly connected thereto, and longitudinal ways or shears extending toward the tail end of the lathe and arranged between the front and rear walls of the pan, said longitudinal ways or shears being rigidly connected to one of the transverse ways or shears and to the bottom of the pan.

6. A lathe-bed comprising a substantially oblong pan, a transverse partition extending from the front wall to the rear wall and arranged relatively near the head-end wall thereof, parallel cross-braced vertical longitudinal walls extending from said partition toward the tail-end wall of said pan, said parts all being formed integrally in one casting.

7. A lathe-bed comprising an oblong pan, a transverse vertical partition at the head end thereof, whereby a chamber or compartment is formed at said head end, and longitudinal parallel vertical walls extending from said partition toward the tail end of said pan, the front and rear walls having their upper edges inclined from the head end toward the tail end of said pan to expose said longitudinal walls.

In testimony whereof I have affixed my signature in presence of two witnesses.

JAMES HARTNESS.

Witnesses:

MARoUs B. lVIAY, (J. 0. STEOHER. 

